forked from zhurui/management
108 lines
3.0 KiB
JavaScript
108 lines
3.0 KiB
JavaScript
var TYPE = require('../../tokenizer').TYPE;
|
|
var rawMode = require('./Raw').mode;
|
|
|
|
var ATKEYWORD = TYPE.AtKeyword;
|
|
var SEMICOLON = TYPE.Semicolon;
|
|
var LEFTCURLYBRACKET = TYPE.LeftCurlyBracket;
|
|
var RIGHTCURLYBRACKET = TYPE.RightCurlyBracket;
|
|
|
|
function consumeRaw(startToken) {
|
|
return this.Raw(startToken, rawMode.leftCurlyBracketOrSemicolon, true);
|
|
}
|
|
|
|
function isDeclarationBlockAtrule() {
|
|
for (var offset = 1, type; type = this.scanner.lookupType(offset); offset++) {
|
|
if (type === RIGHTCURLYBRACKET) {
|
|
return true;
|
|
}
|
|
|
|
if (type === LEFTCURLYBRACKET ||
|
|
type === ATKEYWORD) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
module.exports = {
|
|
name: 'Atrule',
|
|
structure: {
|
|
name: String,
|
|
prelude: ['AtrulePrelude', 'Raw', null],
|
|
block: ['Block', null]
|
|
},
|
|
parse: function() {
|
|
var start = this.scanner.tokenStart;
|
|
var name;
|
|
var nameLowerCase;
|
|
var prelude = null;
|
|
var block = null;
|
|
|
|
this.eat(ATKEYWORD);
|
|
|
|
name = this.scanner.substrToCursor(start + 1);
|
|
nameLowerCase = name.toLowerCase();
|
|
this.scanner.skipSC();
|
|
|
|
// parse prelude
|
|
if (this.scanner.eof === false &&
|
|
this.scanner.tokenType !== LEFTCURLYBRACKET &&
|
|
this.scanner.tokenType !== SEMICOLON) {
|
|
if (this.parseAtrulePrelude) {
|
|
prelude = this.parseWithFallback(this.AtrulePrelude.bind(this, name), consumeRaw);
|
|
|
|
// turn empty AtrulePrelude into null
|
|
if (prelude.type === 'AtrulePrelude' && prelude.children.head === null) {
|
|
prelude = null;
|
|
}
|
|
} else {
|
|
prelude = consumeRaw.call(this, this.scanner.tokenIndex);
|
|
}
|
|
|
|
this.scanner.skipSC();
|
|
}
|
|
|
|
switch (this.scanner.tokenType) {
|
|
case SEMICOLON:
|
|
this.scanner.next();
|
|
break;
|
|
|
|
case LEFTCURLYBRACKET:
|
|
if (this.atrule.hasOwnProperty(nameLowerCase) &&
|
|
typeof this.atrule[nameLowerCase].block === 'function') {
|
|
block = this.atrule[nameLowerCase].block.call(this);
|
|
} else {
|
|
// TODO: should consume block content as Raw?
|
|
block = this.Block(isDeclarationBlockAtrule.call(this));
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
return {
|
|
type: 'Atrule',
|
|
loc: this.getLocation(start, this.scanner.tokenStart),
|
|
name: name,
|
|
prelude: prelude,
|
|
block: block
|
|
};
|
|
},
|
|
generate: function(node) {
|
|
this.chunk('@');
|
|
this.chunk(node.name);
|
|
|
|
if (node.prelude !== null) {
|
|
this.chunk(' ');
|
|
this.node(node.prelude);
|
|
}
|
|
|
|
if (node.block) {
|
|
this.node(node.block);
|
|
} else {
|
|
this.chunk(';');
|
|
}
|
|
},
|
|
walkContext: 'atrule'
|
|
};
|